问生成PDF文件后立即打开该文件

EN

 protected void btnPdf_Click(object sender, EventArgs e)
{
    GridViewRow rows = TraineeGrid.SelectedRow;
    Label varName = (Label)rows.FindControl("lbName");
    string name = varName.Text;
    Label varCourse = (Label)rows.FindControl("lbCourse");
    string course = varCourse.Text;
    Label varCertNum = (Label)rows.FindControl("lbCertNum");
    string certNumber = varCertNum.Text;

    Label varEndDate = (Label)rows.FindControl("lbEndDate");
    string endDate = varEndDate.Text;
    DateTime date = DateTime.Parse(endDate);
    string finalEDate = date.ToString("MMMM dd, yyyy");

    Label varStartDate = (Label)rows.FindControl("lbStartDate");
    string startDate = varStartDate.Text;
    DateTime date1 = DateTime.Parse(startDate);
    string finalSDate = date1.ToString("MMMM dd, yyyy");

    try
    {
        string inputCertificate = "D:\\Intern\\BASSWeb\\Certificates\\InitialCertificate.pdf";
        string outputCertificate = "D:\\Intern\\BASSWeb\\Certificates\\" + course + "_" + name + ".pdf";
        string newFileName = getNextFileName(outputCertificate);


        // open the reader
        PdfReader reader = new PdfReader(inputCertificate);
        Rectangle size = reader.GetPageSizeWithRotation(1);
        Document document = new Document();

        // open the writer
        FileStream fs = new FileStream(outputCertificate, FileMode.Create, FileAccess.Write);
        PdfStamper stamp = new PdfStamper(reader, fs);
        PdfContentByte cb = stamp.GetOverContent(1);
        var pageSize = reader.GetPageSize(1);
        ColumnText ct = new ColumnText(cb);

        Font font = FontFactory.GetFont(FontFactory.HELVETICA_BOLD, 45, iTextSharp.text.Color.BLACK);
        ct.SetSimpleColumn(28f, 100f, 600f, 305f);
        Paragraph certText = new Paragraph(new Phrase(20, name, font));
        ct.AddElement(certText);
        ct.Go();

        Font font2 = FontFactory.GetFont(FontFactory.HELVETICA_OBLIQUE, 19, iTextSharp.text.Color.GRAY);
        ct.SetSimpleColumn(28f, 100f, 600f, 370f);
        certText = new Paragraph(new Phrase("This is to certify that ", font2));
        ct.AddElement(certText);
        ct.Go();
        ct.SetSimpleColumn(28f, 100f, 500f, 277f);
        certText = new Paragraph(new Phrase(" has successfully completed the " + course + " at BASS Philippines RHQ", font2));
        ct.AddElement(certText);
        ct.Go();
        ct.SetSimpleColumn(28f, 100f, 500f, 210f);
        certText = new Paragraph(new Phrase("From: " + finalSDate + "", font2));
        ct.AddElement(certText);
        ct.Go();
        ct.SetSimpleColumn(28f, 100f, 500f, 186f);
        certText = new Paragraph(new Phrase("To: " + finalEDate + "", font2));
        ct.AddElement(certText);
        ct.Go();

        Font font3 = FontFactory.GetFont(FontFactory.HELVETICA_BOLD, 10, iTextSharp.text.Color.BLACK);
        ct.SetSimpleColumn(0f, 100f, 500f, 620f);
        certText = new Paragraph(new Phrase("Certificate Number: " + certNumber + "", font3));
        ct.AddElement(certText);
        ct.Go();

        stamp.Close();
        reader.Close();
        fs.Close();
        document.Open();
        string script = "alert(\" A Certificate has been generated \");";
        ScriptManager.RegisterStartupScript(this, GetType(), "ServerControlScript", script, true);

        Response.Clear();
        Response.ContentType = "application/pdf";
        Response.WriteFile(outputCertificate);
        Response.End();  }